ci(refresh-catalog): fetch existing branch before force-with-lease (#15)

When attempt 1 of a scheduled run pushes the branch and a later attempt
re-runs the job, actions/checkout only fetches main. Without a
remote-tracking ref for the catalog/refresh-* branch, git push
--force-with-lease aborts with "stale info" and the workflow can never
succeed on retry. Explicitly fetch the branch (best-effort, since it may
not yet exist on first runs) so the lease has something to compare.

Author: danielnaab

.github/workflows/refresh-catalog.yml

@@ -39,6 +39,8 @@ jobs:
           BRANCH="catalog/refresh-$DATE"
           git config user.name 'github-actions[bot]'
           git config user.email 'github-actions[bot]@users.noreply.github.com'
+          # Ensure remote-tracking ref exists so --force-with-lease works on retries.
+          git fetch origin "+refs/heads/$BRANCH:refs/remotes/origin/$BRANCH" || true
           git checkout -B "$BRANCH"
           git add data/repos.json
           git commit -m "chore(catalog): refresh snapshot $DATE"